Harvard and China have one thing in common: They both consider themselves to be the center of the world. So, it was always inevitable that when the scandal that brought down Chongqing party boss Bo Xilai broke, the repercussions would be felt, somehow, in Cambridge. The connection, it turned out, was Bo Guagua, the son of the disgraced Communist official. The younger Bo was a graduate student at Harvard’s Kennedy School of Government. In April, he stopped attending classes and was seen leaving his off-campus apartment with what appeared to be a security detail.